CVE-2023-39780 ASUS RT-AX55 Routers: command or code injection
In plain words: The program treats text it receives as instructions instead of plain data. The attacker can run commands on the machine — often the whole device is taken over.
Confirmed exploited by CISA on · US federal patch deadline Jun 23, 2025
What to do
- Install ASUS's security update for RT-AX55 Routers. If no update exists, follow the vendor's workaround or stop using the product until one ships.
- Turn on automatic firmware updates and replace gear the maker no longer supports.
- Change default passwords and switch off remote administration and features you do not use.
- Do not put storage boxes or cameras directly on the internet — use the maker's app or a VPN.
Who is affected
Could reach you. This one is aimed at devices or apps of the kind people own.
What's at risk: Taken over in bulk to join botnets, used to watch your traffic, or — for storage boxes — locked by ransomware.
The details
- Official name
- ASUS RT-AX55 Routers OS Command Injection Vulnerability
- Product
- ASUS RT-AX55 Routers
- CISA description
- ASUS RT-AX55 devices contain an OS command injection vulnerability that could allow a remote, authenticated attacker to execute arbitrary commands. As represented by CVE-2023-41346.
- Type of flaw
- Command or code injection (CWE-78)
- Confirmed exploited
- Jun 2, 2025
- US federal patch deadline
- Jun 23, 2025
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Answering about CVE-2023-39780 ·
Questions about CVE-2023-39780
Is CVE-2023-39780 being exploited?
Yes. CISA added CVE-2023-39780 to its Known Exploited Vulnerabilities catalog on Jun 2, 2025, which means there is reliable evidence of real-world attacks.
How do I fix CVE-2023-39780?
Install ASUS's security update for RT-AX55 Routers. If no update exists, follow the vendor's workaround or stop using the product until one ships. Turn on automatic firmware updates and replace gear the maker no longer supports.
Am I affected by CVE-2023-39780?
Only if you use ASUS RT-AX55 Routers. This one is aimed at devices or apps of the kind people own.